JPH0336599Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention mainly relates to a cutting edge attachment structure for a blade used as a snow plow.

BACKGROUND OF THE INVENTION It is well known that earthwork blades are generally used as snow plows. Although this type of blade is equipped with a steel cutting edge, the reality is that when the blade is operated as a snow plow, the steel cutting edge is used as is for snow removal work. .

[Problems with conventional technology]

However, in the case of steel cutting edges, there is not only the risk of damaging the road surface during snow removal work, but also the sudden shock caused by bumping into protrusions such as manhole covers on the road surface. There is a risk of bruising or injury to the operator's chest, and there is also a risk of damaging the plow itself, that is, the blade itself. Therefore, in recent years, there has been a tendency to use synthetic resin cutting edges instead of conventional steel ones for snow plow cutting edges. However, in the case of synthetic resin cutting edges, there are problems such as how to easily and stably attach them to a snow plow and how to ensure sufficient mounting strength.

[Purpose of invention]

This invention was made in view of the above circumstances, and its main purpose is to eliminate the need for any repair work on the existing blades used in snow plows, etc., and to tighten the existing steel cutting edges on the blades. To provide a cutting edge mounting structure which allows a cutting edge made of synthetic resin to be easily and skillfully added to or removed without changing the state of the cutting edge. Another purpose of this invention is to use a cutting edge made of synthetic resin to smoothly perform snow removal work without damaging the road surface, and to absorb and alleviate the shock when bumping into a protrusion on the road surface. To provide a cutting edge mounting structure which can greatly contribute to improving safety. Another purpose of this invention is to provide a cutting edge mounting structure that allows the existing steel cutting edge to protect the plow body when the synthetic resin cutting edge wears out and reaches its limit. There is something to do.

[Structure of the idea]

In order to achieve the above object, this invention has a cutting edge mounting structure in which a steel cutting edge is bolted to the front side of the edge support part of the blade, and the upper end is attached to the back surface of the steel cutting edge and the upper end is attached to the back side of the steel cutting edge. A cutting edge made of synthetic resin that abuts the lower end of the edge support part and extends downward along the cutting edge made of steel, and this cutting edge made of synthetic resin is sandwiched between the cutting edge made of steel. a common through-bolt that passes through each of the steel cutting edge, the edge support part, and the holding member, and a steel edge that is screwed into the bolt and tightens the steel cutting edge and the edge support part. A clamping nut and a presser foot that is screwed onto the through bolt and tightens the presser member on the back side of the edge support part, and the presser member is used to chuck the synthetic resin cutting edge with the steel cutting edge. The cutting edge mounting structure includes a member tightening nut.

【Example】

Hereinafter, preferred embodiments of this invention will be described in detail based on the drawings. In FIG. 1, reference numeral 1 denotes a blade of a well-known construction that is mainly used as an angle snow plow. Therefore, bolt holes 3 are already provided in the edge support portion 2 of the blade 1 at regular intervals along the longitudinal direction. On the front side of the edge support part 2, a normal steel cutting edge (hereinafter referred to as steel edge) 4 is inserted through a bolt hole 3 into a through bolt 5 and a steel edge tightening nut 6.
It is fastened by A. The above is the well-known mounting structure of the steel edge 4. When the edge 4 is fastened, there is an edge support part 2 on the back side as shown in more detail in FIG.
A stepped portion 7 is formed with the lower edge of the . A synthetic resin cutting edge (hereinafter abbreviated as resin edge) 8 is removably attached using this stepped portion 7 . Resin Edge 8 is integrally formed from a resin material whose main raw material is ultra-high molecular weight polyethylene, which has low friction and low adhesion, and has a paraffin-like surface and excellent properties such as water repellency and durability. have. Further, the resin edge 8 is connected to the edge support portion 2.
It is formed thicker than the wall thickness of the steel edge 4, and has a size that extends downward along the back surface of the steel edge 4 when the upper end abuts against the lower edge of the edge support part 2. When attaching the resin edge 8, a holding member 9 and a spacer 10 are used. In the case of the holding member 9 illustrated in FIG. 2, it is made of a steel plate and has a bolt hole 11 into which the through bolt 5 is fitted. Therefore, when attaching the resin edge 8 to the blade 1, the ordinary steel edge 4 is fastened to the edge support part 2 by the through bolt 5 and the steel edge tightening nut 6A as described above. The through bolt 5 is fitted into the bolt hole 11 of the presser member 9, and a presser member tightening nut 6B, which is different from the steel edge tightening nut 6A, is temporarily tightened. Next, a resin edge 8 is interposed between the steel edge 4 and the presser member 9, and the upper end of the resin edge 8 is brought into contact with the lower end of the edge support part 2,
Moreover, a spacer 10 is interposed between the back surface of the support portion 2 and the upper end side of the pressing member 9. In this state, presser member tightening nut 6B
By tightening, the resin edge 8 is chucked by the steel edge 4 and the holding member 9. In this case, the resin edge 8 is strongly chucked by the elastic force of the steel presser member 9 tightened with the nut 6, and is held in a state extending downward from between the presser member 9 and the steel edge 4. . The blade 1 equipped with the resin edge 8 in this way is used as a snow plow, so that
The resin edge 8 performs the snow removal work, and since the resin edge 8 is strongly chucked as described above and the upper end abuts the lower end of the edge support part 2, it is pressed against the steel edge 4 during the snow removal work. There is no risk that it will sink in between it and the member 9 or fall out from between them. In another embodiment shown in FIG. 3, a counterbore 12 is provided on the resin edge 8 and a stopper claw 1 is provided on the presser member 9 on the opposing surfaces of the resin edge 8 and the presser member 9.
3 are integrally formed. Then, the stopper claw 13 is inserted into the counterbore portion 12.
When the resin edge 8 is fitted and aligned, tighten the presser member 9 in the same way as in the previous embodiment.
I'm chatting with you. In the case of this embodiment, the stability and attachment strength of the resin edge 8 can be further improved. Furthermore, in the embodiment shown in FIG. 4, a flange 9' extending toward the edge support portion 2 side is integrally formed at the upper end of the holding member 9. In the case of this embodiment, since the flange 9' functions as the spacer 10 in the previous embodiment, the spacer 10, which is separate from each of the edge support portion 2 and the holding member 9, can be eliminated, and the number of parts can be reduced. . In FIGS. 3 and 4, the same parts as in FIG. 1 are given the same reference numerals to avoid redundant explanation. As described above, according to this invention, while the normal steel edge is still fastened to the edge support part of the existing blade by the through bolt and the steel edge tightening nut, the presser member is fitted into the through bolt. Thereafter, the resin edge can be chucked and held between the presser member and the back surface of the steel edge by simply screwing together and tightening the presser member tightening nut. Therefore, there is no need for any repair work on the existing blade, and the resin edge can be easily and conveniently added or removed without removing the steel edge. Moreover, since the resin edge is chucked and held as described above with the upper end abutting against the lower end of the edge support of the blade, the resin edge sinks between the steel edge and the holding member due to the load during snow removal work. I have no fear that I will. Therefore, the resin edge allows the snow removal work to be carried out smoothly without any hindrance, does not damage the road surface during the work, and fully takes advantage of the characteristics of the resin edge, which is that it can absorb and alleviate the shock caused by bumping into a protrusion on the road surface. This greatly contributes to improving operator safety. Furthermore, when the resin edge reaches its limit due to wear and tear due to repeated snow removal operations, the steel edge can protect the blade that forms the plow body. Therefore, there is no risk that the blade itself will be damaged due to the progress of wear of the resin edge.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a blade according to a preferred embodiment of this invention, Fig. 2 is an enlarged sectional view of the cutting edge attachment part of the same blade, and Figs. 3 and 4 are different embodiments of this invention. It is a sectional view showing an example. 1...Blade, 2...Edge support section, 4
...Steel cutting edge, 5...Through bolt, 6A...Steel edge tightening nut,
6B...Press member tightening nut, 8...Synthetic resin cutting edge, 9...Press member.

Claims (1)

[Claims for Utility Model Registration] (1) In a cutting edge mounting structure in which a steel cutting edge is bolted to the front side of the edge support portion of the blade, the cutting edge is attached to the back side of the steel cutting edge and the upper end a synthetic resin cutting edge that abuts the lower end of the edge support portion and extends below the steel cutting edge, and a synthetic resin cutting edge between the steel cutting edge and the steel cutting edge. a common through-bolt that passes through each of the steel cutting edge, the edge support part, and the holding member; and a common through bolt that is screwed into the bolt to tighten the steel cutting edge and the edge support part. A steel edge tightening nut and a presser member screwed onto the through bolt are tightened on the back side of the edge support portion, and the synthetic resin cutting edge is chucked between the steel cutting edge and the steel edge member. A cutting edge mounting structure characterized by comprising a holding member and a tightening nut. (2) The synthetic resin cutting edge is an integrally molded synthetic resin product whose main material is ultra-high molecular weight polyethylene with low friction and low adhesion. Cutting edge mounting structure described in section. (3) The cutting edge mounting structure according to claim 1, wherein the holding member is made of a metal plate fastened via a spacer on the back side of the edge support portion. (4) A counterbore is formed on the presser member side of the synthetic resin cutting edge, and a stopper claw facing the counterbore is integrally formed on the presser member, and the stopper claw is fitted into the counterbore. A cutting edge mounting structure according to any one of claims 1 to 3 of the claims registered as a utility model, characterized in that the cutting edge is fully aligned.